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    NASA
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    In this activity, learners discover that one way to cool an object in the presence of a heat source is to increase the distance from it or change the angle at which it is faced. Learners perform an...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    NASA
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    In this geography investigation, learners use a nighttime satellite image to observe areas of light across the United States and to identify patterns and spatial distributions of human settlements....

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours

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